Jamie Condliffe

If you need the fastest mobile data connection you can get, or are agonising over which carrier to plump for, here's something that might help: PC World has tested 3G and 4G connection speeds at multiple locations across 13 cities. Here are the results.

Things change rapidly in the world of mobile providers, so it's good to keep track of who's doing best. PC World tested data connections—in Atlanta, Boston, Chicago, Dallas, Denver, Las Vegas, Los Angeles, New Orleans, New York, San Francisco, San Jose, Seattle, and Washington, D.C.—to find out who can offer you the fastest service.

So who came out on top? For all important download speeds, T-Mobile performs best for 3G, while AT&T wins out for 4G. One thing is definitely clear: Sprint is best avoided. You can check out the results for 3G and 4G in the bar charts above, or read the full report—including their methodology—here. [PC World]